.syntax unified
    .cpu cortex-a7
    .thumb
    @ maze entry logger: record lr/sp to mailbox 0x08006964, return 0.
    @ Guard: if lr is outside known-good SBL/stub ranges, spin with
    @ interrupts disabled instead of jumping into the void (post-mortem
    @ via vec trap regs).
    .text
    .global maze_stub
maze_stub:
    movw r12, #:lower16:0x08006964
    movt r12, #:upper16:0x08006964
    str lr, [r12]
    str sp, [r12, #4]
    movs r0, #0
    lsr r12, lr, #24
    cmp r12, #0x08
    bne maze_hang
    bx lr
maze_hang:
    cpsid i
    b maze_hang